hydra_add_to_queue · Hydra Bridge MCP: Risk & Policy

WHAT IT DOES

What hydra_add_to_queue does on Hydra Bridge

AI agents use hydra_add_to_queue to create or update resources in Hydra Bridge — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Hydra Bridge environment.

WHY IT NEEDS A POLICY

Why hydra_add_to_queue needs a policy

This tool creates or modifies queue state without irreversible destruction or executing arbitrary code. Adding to a queue is a reversible write operation (the download can be cancelled via hydra_cancel_download). It has medium severity because it commits bandwidth and storage resources, but is not destructive and does not immediately execute downloads.

From the tool's definition Tool description states 'Add a game to the download queue' — this creates a new entry in a queue, modifying the state of the download management system.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

hydra_add_to_queue Rate-limited

hydra_add_to_queue stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "hydra_add_to_queue": {
      "limits": [
        {
          "counter": "hydra_add_to_queue_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Hydra Bridge, so you can run agents against it safely.

FAQ

Questions about hydra_add_to_queue

What does the hydra_add_to_queue tool do? +

Add a game to the download queue without starting immediately. It is categorised as a Write tool in the Hydra Bridge MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on hydra_add_to_queue? +

Register the Hydra Bridge MCP server in PolicyLayer and add a rule for hydra_add_to_queue: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Hydra Bridge. Nothing to install.

What risk level is hydra_add_to_queue? +

hydra_add_to_queue is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit hydra_add_to_queue? +

Yes. Add a rate_limit block to the hydra_add_to_queue rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block hydra_add_to_queue completely? +

Set action: deny in the PolicyLayer policy for hydra_add_to_queue. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides hydra_add_to_queue? +

hydra_add_to_queue is provided by the Hydra Bridge MCP server (kleirrampage45/hydra-bridge). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.